Gender differences in retirement income remain an important issue in labour and pension economics. Despite improvements in female educational attainment and labour force participation, pension inequalities persist across many countries. This study examines whether regional labour market structures are associated with gender differences in private pension payouts across Swedish municipalities. Using municipality level panel data for 2015–2024, the analysis combines private pension payout data from the Swedish Pension Agency (Pensionsmyndigheten) with historical labour market indicators constructed from employment data covering 1993–2015. The outcome variable is the gender pension payout gap in voluntary private pension savings (individuellt pensionssparande, IPS), the third pillar of the Swedish pension system measured as the difference between average male and female IPS payouts per recipient across municipalities. OLS regression models with year fixed-effects and municipality clustered standard errors are employed, with interaction models and municipality fixed effects as robustness checks. The results reveal a substantial and persistent gender pension payout gap. On average, men receive approximately SEK 9,689 more annually than women in real terms (2015 kronor), in nominal terms the mean gap is SEK 10,718. The nominal gap increased by 19 percent between 2015 and 2024 however, this largely reflects price inflation of 29 percent over the same period. In real terms the gap declined by 7.4 percent and the relative gap, female payout as a share of male payout, remained stable at approximately 76 percent throughout the decade, indicating that the proportional disadvantage did not worsen over the observation period. Municipalities with higher historical concentrations of women in lower paying sectors exhibit significantly larger pension gaps. This finding holds across all three gap measures and all robustness checks. The effect of female labour force participation becomes insignificant once i labour market composition and local economic conditions are controlled for, suggesting that the type of employment matters more than participation quantity alone. This result is consistent whether the total association (M1) or the association net of municipal income (M2) is the reference specification. Interaction models further show that low sector concentration is disproportionately associated with lower pension accumulation among women relative to men, and that municipalities with stronger male concentration in higher paying sectors show a narrower gender pension gap. The findings indicate that pension inequality should be understood as a long-term reflection of labour market inequalities accumulated throughout working life, contributing new municipality level evidence from Sweden.